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Frequently Asked Questions

Can a Sunflower give me a sunburn?


No. Sunburns are a type of tissue damage that is caused by ultraviolet light. The sunflower only contains red and near-infrared wavelengths which are unable to inflict the type of cellular damage that causes sunburn. In fact, red and near-infrared light are used to repair ultraviolet-induced damage. Next time you get a Sunburn, try using Sunflower on the senstive areas!




How does a Sunflower actually reduce pain?


Pain is a signal sent to our brain to alert the body that there is something wrong. This pain signal could be due to an injury, an infection, a disease, bone scraping against bone, or more. Light therapy, or photobiomodulation, is proven to reduce pain quickly and effectively without side effects. How?

Inflammation Reduction: The main mechanism that causes pain relief is light’s ability to reduce proinflammatory cytokines, which reduces overall inflammation. A reduction in inflammation causes pain to subside. Chronically inflamed joints are extremely painful and impact our entire day. It is important to recognize, however, that inflammation is our body’s response to a negative stimulus, inflammation is not the culprit itself.

With that being said, it is not enough to reduce inflammation (as drugs aim to do); true relief can only be achieved when the underlying cause of inflammation is addressed.

This brings us to blood flow and energy production. Blood Flow: Light Therapy increases blood flow to the exposed portion of your body, especially capillary blood flow. This increased microcirculation gives our cells the oxygen, nutrients, and energy they need to repair the damage that the pain is signaling. A joint or organ without proper microcirculation cannot properly heal, as the resources it needs to repair damage or grow new cells is lacking.

Energy Production: Light Therapy increases our cell’s production of energy through several means. Red and Infrared Light is absorbed by the metal ions within our cell’s mitochondria, increasing the electric potential of the organelle’s membrane and subsequently increasing the potential to synthesize ATP from oxygen and food. Light is also used to stimulate proper mitochondrial respiration by breaking free inhibitory chemicals from the enzymes (CCO) that drive respiration. Without proper light, our mitochondria’s natural process to turn oxygen and food into usable energy is greatly inhibited. If you made it this far, thank you for reading about light! Above is just the tip of the iceberg about light’s mechanisms in reducing pain. Our team is constantly working to improve our communication of this complex science into simpler and more accessible ways.




Are there any side effects to Light Therapy?


Photobiomodulation (PBM) or Light Therapy is regarded as safe and painless; without side effects. There have been thousands of studies completed on Light Therapy to demonstrate this high level of safety. You can read about the FDA’s stance on ‘General Wellness: Policy for Low Risk Devices” here. After a treatment to your face, you may experience green blurred vision. This is a completely normal response that is harmless and will fade after several minutes. This sensation occurs because the rods & cones in our eyes are saturated with a heavy proportion of red light. In rare cases, certain groups of people may be more photosensitive than others due to pre-existing conditions (ex Porphyria) or due to the medication of a specific drug. Any groups meeting this definition should consult with a doctor before using any form of light therapy.




I completed a JustLight routine on my face and my vision looks distorted. Did the light damage my eyes?


It is normal and safe to experience a temporary color distortion after your eyes are exposed to intense red light. This occurs because the red cones in your eyes become temporarily less sensitive to adjust to the intense red light. When the red light exposure ends, the blue and green cones are more sensitive compared to the red cones, which causes everything in your visual field to have color distortion. This effect will not last longer than a couple of minutes and does not pose any long-term negative effects.

Light Therapy, at the dosages and wavelengths emitted by Sunflower, is completley safe for eyes [ 1].




Do I need to wear eye protection?


When using Sunflower on your face, keep your eyes closed for the duration of the session. Although the light will seem unusually bright, it is important to recognize that red and near-infrared wavelengths actually have a net positive overall effect on our eye health. It is completely normal to feel a slightly uncomfortable sense of brightness during your first week of treatments. Recognize that this is our body adjusting to bright light exposure that our eyes previously did not receive.

Additionally, you can wear sunglasses during any face treatment to reduce this perceived discomfort. However, recognize that the sunglasses will block a majority of the light from impacting your face, brain, and eyes, thereby limiting the positive effects of light therapy.

Please note, sunlight can be extremely damaging to the eyes due to the presence of ultraviolet light and blue light. Of course, you should never stare directly at the sun under any circumstances. Please note, Sunflower does not emit ultraviolet/blue light and only emits red/infrared light in amounts that are used to improve eye health.

Any Sunflower sessions that are not directly aimed at the face do not need eye protection nor do you need to close your eyes. It is perfectly safe to view the reflection of light off your knee, stomach, ankle, or wherever you are pointing Sunflower.
Light Therapy, at the dosages and wavelengths emitted by Sunflower, is completley safe for eyes [ 1].




I have more questions!


We love questions!

Sunflower utliizes a lot of complex science and non-intuitive photochemical interactions.

Please email any questions to info@JustLight.com and we will add our answer to the FAQ!




What is Near-Infrared light (NIR)?


Short Answer: NIR Light is deeper penetrating than Red Light with similar benefits, but invisible to human eyes.
The Science A: Humans can view a spectrum from violet (~400nm) to Red (~760nm). Near infrared light exists in the 800-1400 nm wavelength, just outside of the visible spectrum. NIR is used in light therapy because it has a similar mechanism of action as red light does, but it penetrates deeper into the body. NIR and infrared light can often be felt as heat, which is why you may feel warmth coming from your Sunflower.




How does Light therapy / Photobiomodulation work?


Short Answer: Red and near infrared light increases cellular energy, increases blood flow, reduces inflammation, promotes healing pathways, and helps removes waste. Mitochondrial Energy: To understand the biological effects of light we must first look at how a cell produces energy with its mitochondria. Mitochondria use the food we eat and the air we breathe to produce adenosine triphosphate(ATP) which acts as the energy source for the cell. This can be interrupted by nitric oxide(NO), a chemical byproduct of many cellular processes. NO binds to the enzyme cytochrome c oxidase(CCO) inhibiting its intake of oxygen and consequently reducing its production of ATP by nearly 90%. Red and near-infrared light is absorbed by CCO which dissociates NO and dramatically increases ATP production. The increased activity of the CCO also produces a small amount of reactive oxygen species(ROS), which activates transcription factors for genes that promote cellular healing and repair. In other words, the ROS acts as an alarm bell signaling the cell to focus on healing. Together these mechanisms give a cell the instructions to focus on healing and the additional energy to carry out these processes.

Blood Flow: Light Therapy increases blood flow to the exposed portion of your body, especially capillary blood flow. This increased microcirculation gives our cells the oxygen, nutrients, and energy they need to repair the damage that the pain is signaling. A joint or organ without proper microcirculation cannot properly heal, as the resources it needs to repair damage or grow new cells is lacking. Inflammation Reduction: The main mechanism that causes pain relief is light’s ability to reduce proinflammatory cytokines, which reduces overall inflammation. A reduction in inflammation causes pain to subside. Chronically inflamed joints are extremely painful and impact our entire day. It is important to recognize, however, that inflammation is our body’s response to a negative stimulus, inflammation is not the culprit itself. If you made it this far, thank you for reading about light! Above is just the tip of the iceberg about light’s mechanisms in reducing pain. Our team is constantly working to improve our communication of this complex science into simpler and more accessible ways.




Does red light work through clothing?


Although a small amount of light can penetrate through clothing, we recommend that all sessions be performed onto bare skin.

The calculations that govern Sunflower's automated light sessions are operating on the assumption that you are pointing the device at bare, exposed, skin.





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